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Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.

This is an online version of Carbon Brief’s weekly DeBriefed email newsletter. Subscribe for free here.

This week

2023 ‘smashes’ records

RECORD-SHATTERING: 2023 “smashed” the record for the hottest year by a large margin, reported the Guardian. The newspaper said on Tuesday that, according to the EU’s Copernicus Climate Change Service, 2023 was 1.48C hotter than pre-industrial times. This is 0.17C higher than the last record set in 2016 – “marking a very large increase in climate terms”, according to the Guardian. And today the record was confirmed by the UN’s World Meteorological Organization, which has just published the findings of six leading climate datasets.

CHARTING CHANGE: In its coverage of the data, BBC News produced a number of charts and figures illustrating the path of global warming. Its analysis showed that almost every day since July has seen a new global air temperature high for the time of year. Meanwhile, the Independent published a feature examining whether 2024 could be even hotter than 2023.

STATE OF THE CLIMATE: Carbon Brief has just published the last of its quarterly state of the climate updates for 2023. It explains that 2023 was the warmest year “by a large margin”, at between 1.34C and 1.54C above pre-industrial levels across different datasets. Last year was also the warmest on record for ocean heat content, which increased notably between 2022 and 2023.

UK MP quits over fossil fuels

‘TRAGEDY’: The UK’s former energy minister Chris Skidmore quit as an MP in protest at the government’s plans to drill for more oil and gas in the North Sea, the Financial Times reported. In his resignation letter, Skidmore said it was “a tragedy that the UK has been allowed to lose its climate leadership” under prime minister Rishi Sunak, according to the newspaper.

BILL DELAYED: Skidmore quit over the government’s offshore petroleum licensing bill, which aims to “maximise” new oil and gas production, the FT said. The bill was due to be read in the House of Commons this week, but ended up being postponed, the Times reported. BBC News reported that Sir Alok Sharma, the Conservative MP and COP26 president, said he would vote against the bill, calling it “a total distraction” which reinforces the idea the UK is “not serious” about tackling climate change.

Renewables on the rise

RECORD RENEWABLES: A boom in Chinese solar power drove another record-breaking year of renewables growth in 2023, according to a new International Energy Agency (IEA) report covered by Carbon Brief. The world is now on track to build enough solar, wind and other renewables over the next five years to power the equivalent of the US and Canada combined, according to Carbon Brief’s analysis of the findings.

UK SOLAR: Along with the increase in global renewable capacity, there has been continued growth in low-carbon upgrades on UK homes, with solar and heat pumps driving record installations in 2023, according to separate Carbon Brief analysis.

Around the world

  • US COAL DROP: US emissions fell by 1.9% in 2023, largely due to coal declining to its lowest level in 50 years, the New York Times reported. By contrast, US oil and gas production is set to hit a record in 2024 and 2025, said the Financial Times.
  • ‘A LA CARTE’: Saudi Arabia’s energy minister has claimed that the headline COP28 agreement to transition away from fossil fuels is just one of several “choices” on an “a la carte menu”, reported Climate Home News.
  • WAR EMISSIONS: Israel’s assault on Gaza since 7 October has produced more greenhouse gas emissions than 20 of the world’s most climate-vulnerable countries create in a year, according to new analysis covered by the Guardian.
  • GERMANY PROTESTS: Farmers took to the streets of Berlin to protest against the German government’s decision to cut agricultural subsidies, Deutsche Welle reported.
  • DEEP SEA MINING: Norway has become the first nation to approve commercial deep-sea mining, opening up a vast area of the Arctic to the extractive practice despite warnings from scientists, Mongabay reported.
  • OFFSETS CONTROVERSY: The first-ever carbon-offset exchange under a new Paris Agreement mechanism, involving Switzerland buying credits for the rollout of electric buses in Thailand, is facing integrity questions, Climate Home News said.

40%

The proportion of North Sea oil and gas licences in UK waters owned by foreign companies and investors, according to EnergyMonitor.


Latest climate research

  • A new research paper in Nature Climate Change presented a “conceptual framework” for considering the role of justice within climate research.
  • The presence of urban green space is associated with “significantly lower rates of violent crime committed outside”, according to an International Journal of Biometeorology study conducted in Australia.
  • A pair of studies in the Journal of Climate delved into an “exceptional heatwave” in east Antarctica in 2022, which brought “widespread 30-40C temperature anomalies across the ice sheet”.

(For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Monday, Tuesday, Wednesday, Thursday and Friday.)

Captured

A record 42 editorials opposing action to tackle climate change were published by UK newspapers in 2023, according to new Carbon Brief analysis. Written almost exclusively by right-leaning papers, these editorials called for delays to UK bans on the sale of fossil fuel-powered cars and boilers, as well as for more oil-and-gas production in the North Sea, according to the findings. In response to such demands, prime minister Rishi Sunak performed a “U-turn” in September on some of his government’s major net-zero policies.

Spotlight

Investigating Antarctica’s colossal icebergs

This week, Carbon Brief speaks to Dr Oliver Marsh, a glaciologist who is principal investigator of a British Antarctic Survey (BAS) mission currently studying iceberg calving events at Antarctica’s Brunt ice shelf (pictured).

Carbon Brief: Can you please explain what fieldwork you are currently working on?

Dr Oliver Marsh: We are drilling ice cores to collect ice samples from the Brunt ice shelf. These will be brought back to Cambridge [where BAS is located] and University College London (UCL) in order to test their physical and chemical properties. We are also setting up seismic and GPS equipment to monitor fracture growth and strain rates on the ice shelf. We will then link the properties of the ice to the behaviour of the fractures.

CB: What do you hope to find out by conducting this fieldwork?

OM: We are interested in the mechanism and timing of crack growth leading to iceberg calving [where chunks of ice break off from the front of a glacier]. In particular, we want to understand how changes in ice properties change calving rates. The ice shelf we are working on has a well-documented history of crack growth, with two large calving events in the last three years, and the new information we gain from precise laboratory measurements will help us to understand how – and under what conditions – fractures occur in the lead-up to these calving events.

CB: What are the biggest hazards with conducting fieldwork on the Brunt ice shelf?

OM: The Brunt ice shelf is a good location to monitor fracture growth due to its dynamic behaviour. This means there are rifts and other cracks in the ice that can be hazardous for travel. These cracks are heavily monitored with a suite of geophysical instruments, including ground-penetrating radar, GPS and satellite data, and precautions are taken when moving around. Fieldwork in Antarctica also has significant hazards associated with the weather, for example, strong winds and wind chill.

CB: How is climate change affecting iceberg calving events in Antarctica?

OM: Calving occurs as a normal process of ice loss from the continent. But, as it occurs in discrete events and very infrequently for some ice shelves, it is difficult to determine whether rates are changing from a short satellite record. Other fracturing processes, such as hydrofracture and ice shelf collapse, are linked to both ocean and atmospheric warming, so it is possible that calving rates may increase in the future.

CB: What would be the implications of accelerated iceberg calving for the climate and ecosystems?

OM: Increased calving is likely to weaken ice shelves that fringe the continent and support the glaciers inland. This can help to speed up glacier flow and ice loss to the ocean, contributing to sea level rise. An increase in the volume of icebergs may also cause issues for ecosystems, particularly in areas where icebergs ground on the ocean floor, blocking foraging routes for penguins and seals, for instance.

Watch, read, listen

IDAI AFTERMATH: An audio documentary from the BBC World Service explored how communities in Beira, Mozambique are still reeling five years after Cyclone Idai.

PEOPLE FIRST: Context spoke to a range of experts about how the deal to transition away from fossil fuels agreed at COP28 can be achieved in a way that prioritises people’s needs.

INFLECTION POINTS: Robinson Meyer, founding editor of the climate publication Heatmap, appeared on the Chris Hayes Podcast to talk about rising fossil fuels and falling low-carbon technology prices.

Coming up

Pick of the jobs

DeBriefed is edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org

The post DeBriefed 12 January: 2023 ‘smashes’ global heat record; UK MP quits over oil and gas; Studying Antarctica’s mammoth icebergs appeared first on Carbon Brief.

DeBriefed 12 January: 2023 ‘smashes’ global heat record; UK MP quits over oil and gas; Studying Antarctica’s mammoth icebergs

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REPORT: The Hidden Risks of Plastic Pouches for Baby Food

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It’s been less than 20 years since baby food in plastic pouches first appeared on supermarket shelves. Since then, these convenient and popular “squeeze-and-suck” products have become the dominant packaging for baby food, transforming the way that millions of babies are fed around the world. But emerging evidence raises concerns that big food brands are feeding our children plastic pollution with unknown consequences, by selling baby food in flexible plastic packaging.

Testing commissioned by Greenpeace International in 2025 found plastic particles in the baby food products of two global consumer goods companies – Danone and Nestlé. The study suggests a link between the type of plastic the pouches are lined with – polyethylene – and some of the microplastics found. Tests also suggest a range of plastic-associated chemicals in the packaging and food of both products.



Underwater image of a turtle with plastic on his head.


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REPORT: The Hidden Risks of Plastic Pouches for Baby Food

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U.N. General Assembly Embraces Court Opinion That Says Nations Have a Legal Obligation to Take Climate Action

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The U.S. was among eight countries that voted against endorsing the nonbinding ruling that said all nations must take steps to limit temperature rise to 1.5 degrees Celsius.

The United Nations General Assembly on Wednesday voted overwhelmingly in favor of a climate justice resolution championed by the small Pacific Island nation of Vanuatu. The resolution welcomes the historic advisory opinion on climate change issued by the International Court of Justice in July 2025 and calls upon U.N. member states to act upon the court’s unanimous guidance, which clarified that addressing the climate crisis is not optional but rather is a legal duty under multiple sources of international law.

U.N. General Assembly Embraces Court Opinion That Says Nations Have a Legal Obligation to Take Climate Action

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New coal plants hit ‘10-year’ global high in 2025 – but power output still fell

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The number of new coal-fired power plants built around the world hit a “10-year high” in 2025, even as the global coal fleet generated less electricity, amid a “widening disconnect” in the sector.

That is according to the latest annual report from Global Energy Monitor (GEM), which finds that the world added nearly 100 gigawatts (GW) of new coal-power capacity in 2025, the equivalent of roughly 100 large coal plants.

It adds that 95% of the new coal plants were built in India and China.

Yet GEM says that the amount of electricity generated with coal fell by 0.6% in 2025 – with sharp drops in both China and India – as the fuel was displaced by record wind and solar output, among other factors.

The report notes that there have been previous dips in output from coal power and there could still be ups – as well as downs – in the near term.

For example, nearly 70% of the coal-fired units scheduled to retire globally in 2025 did not do so, due to postponements triggered by the 2022 energy crisis and policy shifts in the US.

However, GEM says that the underlying dynamics for coal power have now fundamentally shifted, as the cost of renewables has fallen and low usage hits coal profitability.

China and India dominate growth

In 2025, coal-capacity growth hit a 10-year high, with 97 gigawatts (GW) of new power plants being added, according to GEM.

(Capacity refers to the potential maximum power output, as measured in GW, whereas generation refers to power actually generated by the assets over a period of time, measured in gigawatt hours, GWh.)

This is the highest level since 2015 when 107GW began operating, as shown in the chart below. This makes 2025 the second-highest level of additions on record.

Four charts showing that new coal plants hit '10-year high' in 2025
Coal-fired power capacity that began operation each year from 2000 to 2025, GW. Source: Global Energy Monitor.

The majority of this growth came from China and India, which added 78GW and 10GW, respectively, against 9GW from all other countries.

Yet GEM points out that, even as coal capacity in China grew by 6%, the output from coal-fired power plants actually fell 1.2%. This means that each power plant would have been running less often, eroding its profitability. Similarly, capacity in India grew by 3.8%, while generation fell by 2.9%.

China and India had accounted for 87% of new coal-power capacity that came into operation in the first half of 2025. The shift up to 95% in the year as a whole highlights how increasingly just those two countries dominate the sector, GEM says.

Christine Shearer, project manager of GEM’s global coal plant tracker, said in a statement:

“In 2025, the world built more coal and used it less. Development has grown more concentrated, too – 95% of coal plant construction is now in China and India, and even they are building solar and wind fast enough to displace it.”

Both China and India saw solar and wind meet most or all of the growth in electricity demand last year.

Analysis for Carbon Brief last year showed that, in the first six months of 2025 alone, a record 212GW of solar was added in China, helping to make it the nation’s single-largest source of clean-power generation, for example.

However, the country continues to propose new coal plants. In 2025, a record 162GW of capacity was newly proposed for development or reactivated, according to GEM. This brought the overall capacity under development in the country to more than 500GW.

China’s 15th “five-year plan”, covering 2026-2030, had pledged to “promote the peaking” of coal use, while a more recent pair of policies introduced stricter controls on local governments’ coal use.

For its part, in India some 28GW of new coal capacity was newly proposed or reactivated last year, bringing the total under development to 107.3GW and under-construction capacity to 23.5GW.

The Indian government is planning to complete 85GW of new coal capacity in the next seven years, even as clean-energy expansion reaches levels that could cover all of the growth in electricity demand.

Outside of China and India, GEM says that just 32 countries have new coal plants under construction or under development, down from 38 in 2024.

Countries that have dropped plans for new coal in 2025 include South Korea, Brazil and Honduras, it says. GEM notes that the latter two mean that Latin America is now free from any new coal-power proposals.

This means that both electricity generation from coal and the construction of new coal-fired power plants are increasingly concentrated in just a few countries, as the chart below shows.

Two charts showing that the top 10 countries for coal-fired electricity also dominate plans for new capacity
Top 10 countries for total operating coal power-plant capacity (left) and for newly added capacity (right), GW. Source: Global Energy Monitor.

Indonesia’s coal fleet grew by 7% in 2025 to 61GW, with a quarter of the new capacity tied to nickel and aluminium processing, according to GEM.

Turkey – which is gearing up to host the COP31 international climate summit in November – has just one coal-plant proposal remaining, down from 70 in 2015.

The amount of new coal capacity that started to operate in south-east Asia fell for the third year in a row in 2025, according to GEM.

Countries in south Asia that rely on imported energy are increasingly looking to other technologies to protect themselves from fossil-fuel shocks, such as Pakistan, which is rapidly deploying solar, states the GEM report.

In Africa, plans for new coal capacity are concentrated in Zimbabwe and Zambia, the report shows, with the two countries accounting for two-thirds of planned development in the region.

‘Persistence of policies’

While new coal plants are still being built and even more are under development, GEM notes that the global electricity system is undergoing rapid changes.

Crucially, the growth of cheap renewable energy means that new coal plants do not automatically translate into higher electricity generation from coal.

Without rising output from coal power, building new plants simply results in the coal fleet running less often, further eroding its economics relative to wind and solar power.

Indeed, GEM notes that electricity generation from coal fell globally in 2025. Moreover, a recent report by thinktank Ember found that renewable energy overtook coal in 2025 to become the world’s largest source of electricity.

GEM notes that coal generation may fluctuate in the near term, in particular due to potential increases in demand driven by higher gas prices.

It adds that gas price shocks, such as the one triggered by the Iran war, can cause temporary reversals in the longer-term shift away from coal.

According to Carbon Brief analysis, at least eight countries announced plans to either increase their coal use or review plans to transition away from coal in the first month of the Iran war. However, a much-discussed “return to coal” is expected to be limited.

GEM’s report highlights that global fossil-fuel shocks can have an impact on the phase out of coal capacity over several years.

In the EU, for example, 69% of planned retirements did not take place in 2025, due to postponements that began in the 2022-23 energy crisis triggered by the Russian invasion of Ukraine, according to the report. Countries across the bloc chose to retain their coal capacity amid gas supply disruptions and concerns about energy security.

Yet coal-fired power generation in the bloc is now more than 40% below 2022 levels. Again, this highlights that coal capacity does not necessarily translate into electricity generation from coal, with its associated CO2 emissions.

Overall, GEM notes that “repeated exposure to fossil-fuel price volatility is as likely to accelerate the shift toward clean energy as it is to delay it”.

GEM’s Shearer says in a statement:

“The central challenge heading into 2026 is not the availability of alternatives, but the persistence of policies that treat coal as necessary even as power systems move increasingly beyond it.”

In the US, 59% of planned retirements in 2025 did not happen, according to GEM. This was due to government intervention to keep ageing coal plants online.

Five coal-power plants have been told to remain online through federal “emergency” orders, for example, even as the coal fleet continues to face declining competitiveness.

Keeping these plants online has cost hundreds of millions of dollars and helped drive an annual increase in the average US household electricity prices of 7%, according to GEM.

Despite such measures, Trump has overseen a larger fall in coal-fired power capacity than any other US president, according to Carbon Brief analysis.

Meanwhile, according to new figures from the US Energy Information Administration, solar and wind both set new records for energy production in 2025.

Despite challenges with policy and wider fossil-fuel impacts, the underlying dynamic has shifted, says GEM, as “clean energy becomes more competitive and widely deployed” around the world.

It adds that this raises the prospect of “a more sustained decoupling between coal-capacity growth and generation, particularly if clean-energy deployment continues at current rates”.

The post New coal plants hit ‘10-year’ global high in 2025 – but power output still fell appeared first on Carbon Brief.

New coal plants hit ‘10-year’ global high in 2025 – but power output still fell

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